Speed-governor.



' PATENTED MAILZZ, 1904. J. w. MAOPARLANB.

SPEED GOVERNOR.

APPLIOATION FILED FEB. 5. 1903.

no MODEL.

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Patented March 22, 1904.

PATENT UEETCE.

JAMES WRIGHT MAGFARLANE, OF GLASGOW, SCOTLAND.

SPEED-GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 755,575, dated March 22, 1904.

Original application filed May 27, 1901, Serial No. 62,110. Divided and this application filed February 5, 1908. Serial To all whom, it may concern:

Be it known that I, J AMES WRIGHT MAO- FARLANE, a subject of the King of Great Britain, and a resident of Glasgow, Scotland, have invented certain new and useful Improvements in Speed-Governors,- of which the following is a specification.

This invention relates to speed-governors; and it has for its object to provide an improved governor or regulator of the class shown in my copending application, filed May 27, 1901, Serial N 0. 62,110, of which this application is a division.

The invention consists of the parts and the combinations of parts more fully hereinafter described, and pointed out in the claims.

In the drawings forming a part of this specification, Figure 1 is a section through the casing which usually surrounds the waterwheel, said wheel being shown by means of a full-line circle and adotted-line circle,with one embodiment of my invention mounted within the casing. Fig. 2 is another embodiment of my invention, illustrated similarly to Fig. 1. Fig. 3 is still further embodiment of my invention. Fig. 4 is a still further embodiment of my invention.

The casing A has mounted therein a wheel B, which rotates in the direction of the arrow I). The motive power of the wheel is a fluid delivered to the bucket through a nozzle E tangentially and in a line central to the periphery of the wheel. In starting, the fluid strikes the wheel, and the escaping or spent fluid is immediately thrown backward. As the speed of the wheel increases this backward motion of the escaping or spent fluid becomes less until the correct speed is reached, when the fluid merely drops free of the wheel Without backward motion. If, however, the speed of the wheel becomes greater than the correct speed, the escaping fluid has a forward motion in the direction of the rotation of the wheel.

It now becomes necessary to reduce the supply of fluid. I accomplish the reduction of the fluid, and thereby control the speed of the wheel, by means of a lever G, connected with (N0 model.)

the valve H at one end and at its other end to a baifle or similar device I, which is located in advance of the nozzle and in the path of the spent fluid when the wheel is running above the correct speed, the lever being returned in the other direction by a spiral spring J connected at one end to the casing and the other end to the lever or the baflie.

In Fig. l the baflie I consists of a bucket having a contracted outlet I. The amount of water which reaches the bucket I will depend on the speed of the wheel, and when the speed passes the desired limit the water in I will be suificient in quantity to depress the lever G, overcome the power of the spring J, and partially close the nozzle E. The speed of the wheel will then decrease and the water cease entering I, the water which has already entered I will escape through I, and the spring J will raise the lever G and reopen the valve H. The position of the bucket will adjust itself so as to maintain a constant and regulated speed of the wheel.

In Fig. 2 the baffle consists of a troughed metal plate and is rigidly secured to the lever, and the spiral spring is secured to the casing and to the baflie.

In Fig. 3 a bucket I, having an outlet I, is suspended from the lever G and the spring J, which is secured to the casing.

In Fig. 4 the baflie I is also a troughed metal plate, and instead of being supported by the lever G and the spring J is pivoted to the casing and connected to the lever, spring J being connected to the baffle and to the casing.

Having thus described my invention, the following is what I claim as new:

1. The combination with the casing and a wheel within the casing, of a nozzle delivering fluid tangentially in a line central to the periphery of the wheel, a valve for the nozzle, a lever connected with the valve of the nozzle at one end to reduce or increase the supply through the nozzle, a baflie in alinement with the wheel and the nozzle, connected to the other end of the lever and moved in one direction by the spent fluid, to move the end of the lever thereby reducing the supply through the nozzle, and a spring connected to the easing and with the bafile to move the said baffle in the other direction to increase the supply.

2. In a speed-governor for Water-Wheels, turbines and the like, the combination With the casing and the Water-Wheel, of the nozzle, a lever connected at one end to the nozzle, and a baffle suspended from the other end of the lever, and moving the lever in one direction, and a spring connected With the baflle and the casing and moving the lever in the other direction. v

3. In a speed-governor for Water-Wheels, turbines, and the like, the combination with the nozzle, a baffle consisting of a bucket provided With a contracted outlet, and connec- 

